Regular Expressions 101

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An explanation of your regex will be automatically generated as you type.
Detailed match information will be displayed here automatically.
  • All Tokens
  • Common Tokens
  • General Tokens
  • Anchors
  • Meta Sequences
  • Quantifiers
  • Group Constructs
  • Character Classes
  • Flags/Modifiers
  • Substitution
  • A single character of: a, b or c
    [abc]
  • A character except: a, b or c
    [^abc]
  • A character in the range: a-z
    [a-z]
  • A character not in the range: a-z
    [^a-z]
  • A character in the range: a-z or A-Z
    [a-zA-Z]
  • Any single character
    .
  • Alternate - match either a or b
    a|b
  • Any whitespace character
    \s
  • Any non-whitespace character
    \S
  • Any digit
    \d
  • Any non-digit
    \D
  • Any word character
    \w
  • Any non-word character
    \W
  • Non-capturing group
    (?:...)
  • Capturing group
    (...)
  • Zero or one of a
    a?
  • Zero or more of a
    a*
  • One or more of a
    a+
  • Exactly 3 of a
    a{3}
  • 3 or more of a
    a{3,}
  • Between 3 and 6 of a
    a{3,6}
  • Start of string
    ^
  • End of string
    $
  • A word boundary
    \b
  • Non-word boundary
    \B

Regular Expression

/
/
gm

Test String

Code Generator

Generated Code

# coding=utf8 # the above tag defines encoding for this document and is for Python 2.x compatibility import re regex = r"^(?:0|(?:\+|00) ?31 ?)(?:(?:[1-9] ?(?:[0-9] ?){8})|(?:6 ?-? ?[1-9] ?(?:[0-9] ?){7})|(?:[1,2,3,4,5,7,8,9]\d ?-? ?[1-9] ?(?:[0-9] ?){6})|(?:[1,2,3,4,5,7,8,9]\d{2} ?-? ?[1-9] ?(?:[0-9] ?){5}))$" test_str = ("this is a list of numbers inline 06-12345678 gggf0612345678 06 12345678 0101234567 010-1234567 dfgfdg010 1234567 010 12 34 567 more 010 12 34567 yes 010 1234 567 and more +31612345678 and more and this 0031123456789\n" "dfgfd and here are some separate lines:\n" "06-12345678\n" "0612345678\n" "0612345678\n" "0101234567\n" "010-1234567\n" "010 1234567\n" "010 12 34 567\n" "010 12 34567\n" "010 1234 567\n" "+31612345678\n" "0031123456789\n" "ghf@fghgfh.coml\n") matches = re.finditer(regex, test_str, re.MULTILINE) for matchNum, match in enumerate(matches, start=1): print ("Match {matchNum} was found at {start}-{end}: {match}".format(matchNum = matchNum, start = match.start(), end = match.end(), match = match.group())) for groupNum in range(0, len(match.groups())): groupNum = groupNum + 1 print ("Group {groupNum} found at {start}-{end}: {group}".format(groupNum = groupNum, start = match.start(groupNum), end = match.end(groupNum), group = match.group(groupNum))) # Note: for Python 2.7 compatibility, use ur"" to prefix the regex and u"" to prefix the test string and substitution.

Please keep in mind that these code samples are automatically generated and are not guaranteed to work. If you find any syntax errors, feel free to submit a bug report. For a full regex reference for Python, please visit: https://docs.python.org/3/library/re.html